Based upon a recent email to the X.Org developers' mailing list, Canonical is nearing the point of one of their goals for Ubuntu 10.10 of a rootless X Server, or being able to run the X.Org Server without root privileges.

The good news is that he has knowledge about x, because he works with it, whats good and what's bad.

I'm just going to say that I think Wayland also has some design issues. The main one is pushing too much windows management into the clients. The plan is that things like window moving and even wobbly windows would be implemented in the client. To me this is a clear layering violation. It also makes it way harder to do things like tiling window managers.

Personally, I am working on my own windowing system like Wayland, mainly as a proof of concept for how I think window management and input should be done. I think Wayland has a much greater chance of actually becoming the standard Linux windowing system though.

And more, with his Stack its possible to run an X-server on top for application that is dependent on X.

That's possible, but you would actually almost never do that. Almost all apps use Gtk+ or Qt, which would simply be ported to run on Wayland. If for some reason that doesn't work, you would run a rootless X server like Xming for Windows, so that the apps would properly integrate with the Wayland desktop, much like X11 on Mac OS X. (Note that this article really should not say "rootless", because that has a very different meaning in X.)

These drivers exist as I understood for ATI and Nvidia, but sadly not for Intel.

Nope, you've got that completely backwards. The drivers exist for Intel. ATI would work with a few small patches. NVIDIA's binary drivers will probably never work with it, but the Nouveau drivers would also work with a few small patches.

I think there are already proof of concept integration with GTK+ running on top of Wayland.

Nope. That's also backwards. I think Qt is much closer to being able to run on Wayland (especially with acceleration) than Gtk+ is.